public class day01 {
    public static void main(String[] args) {
        printMsg(20);
    }

    /*打印输出*/
    public static  void printMsg(int maxNum){
        for (int i = 0 ; i < maxNum ; i ++){
            System.out.println("这里是第" + (i+1) +"行" + "\n");
        }
    }
}
